Gosling with a bottom problem, please help

I hatched a gosling. Good start lol
It spent 48hrs in egg after pipping, so decided to assist hatch. She started weak and floppy but has gained strength every hour since. However, something hasn't absorbed right, I was thinking a bit of yolk perhaps, but it doesn't seem to be going anywhere. Honestly looks like she has a pair of tiny testicle behind her lol. Am keeping her environment clean and dry as poss to avoid infection etc, how long do I wait to see if this lump is absorbed? Cheers x